Hello,

I am creating a simple XSLT using the <xsl:choose> instruction to conditionally handle varying attributes for a <Para> tag in my file.

The test branching seems to work just fine, the problem is that the <xsl:otherwise> alwise fires, even when one of the other branches has already executed.

Here is the code snippet:
    <xsl:template match="Para">
        <p>
        <xsl:choose>
            <xsl:when test="@Justify='Center'">
                <center>
                    <xsl:value-of select="." />
                </center>
            </xsl:when>
            <xsl:when test="@FirstLineIndent='7'">
                <xsl:text> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</xsl:text>
                <xsl:value-of select="." />
            </xsl:when>
            <xsl:when test="@FirstLineIndent='13'">
                <xsl:text>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs p;&nbsp;&nbsp;&nbsp;
                                &nbsp;&nbsp;&nbsp;
                </xsl:text>
                <xsl:value-of select="." />
            </xsl:when>
            <xsl:when test="@FirstLineIndent='19'">
                <xsl:text>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs p;&nbsp;&nbsp;&nbsp;
                                &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n bsp;
                </xsl:text>
                <xsl:value-of select="." />
            </xsl:when>
            <xsl:otherwise>
                <xsl:value-of select="." />
            </xsl:otherwise>
        </xsl:choose>
         </p>
      </xsl:template>


So in the example, after a <center> 'd paragraphs text is displayed correctly, the <xsl:otherwise> displays the text again, resulting in double output.

Thanks for any help with this.

Dan

How do you know that its the xsl:otherwise that's producing the text again? Could it not be coming from another template, or a default rule? I only ask because its extremely unlikely that your xsl processor is running the 'otherwise' condition as well as one of the 'when' conditions.

What processor are you using? Do you have access to a debugger that you can use to step through the transform?

I am using the Altova XMLSpy 5.0 program and debugger to step through the XML file as the XSLT transformation is taking place.

After the <xsl:when test="@Justify='Center'"> is processed I can step through and watch the <xsl:choose> and each other <xsl:when> condition get evaluated. I then see the <xsl:otherwise> step being executed.

The duplicate output is coming from the otherwise statement, not from another template.

Either your XSLT processor has a very strange bug indeed, or your diagnosis of the problem is wrong. Try it on another XSLT processor to see which is the case.



Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Thanks to all for the posts. This is indeed a bug in the XML tool I am using, it was reported as fixed in the latest SP, but apparently still exists. This statement is working correctly in another XSLT processor.

Regards,
Dan